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In page Wreck diving:
"An alternative approach, popularised by deep wreck divers in the American Northeast, is referred to as "progressive penetration". Progressive penetration eschews the use of reels, but the diver makes several successive penetrations, each successively deeper than the last, memorising the layout for both the inward and outward journeys. The method is vulnerable to complete loss of visibility in a silt-out, and any disorientation in an unfamiliar area.[2] As a diving technique, progressive penetration is not taught by any of the mainstream diver training agencies.[3]
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